Pressure regulator and cut-off



w W M Apr. 3, 1923.

J. B. MORROW PRESSURE REGULATOR AND CUT-OFF Filed June 7 1921 J Marrmx preventin the over' inflatlonof pane new, a, neat...

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JOHN B. nonnow', 'ornaiaarseuae, PENNSYLVANIA.

intents;

PATENT orients.

reassess nneu-Laronm o'o'r-orr.

\ Application filed June 7, 921. Serial no. 475,706.

\ T0 aZZ who m, it my concern.

Be it known that l, JOHN B. Morrow, a citizen of the United States residing at Harrisburg, in the county ofbauphln and State of Pennsylvania, have invented certain new and useful Improvements in a Pressure Regulator and Gut-OE andIdo hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 0

The invention relates to automa-tlc regulator and cut oif for fluid pressure and is designed specifically to provide means for pneumatic tire and like inflatable devices.

The regulator includes a setting mechanism whereb the air pressure may be ded a cut ofi' for closing the presflated and the valve controlling the admis sion of air to the regulator. Y.

Other'objects. and advantages will be apparent and suggest themselves as the natur of the invention is understood.

While the drawing illustrates an embodiment of the invention it is to be understood that in ad'apting'the same to meet difierent conditions and requirements, varlous changes in the form, proportion and minor detalls of construction may be resorted to without de-' parting from the nature of. the invention.

Referring to the accompanying drawing forming a part-of this specification,

Figure 1 is a top plan view of a comblned pressure regulator and'cut ofi embodying I the invention,

dill)- Figure 2 is a side view thereof, I Figure 3 is a vertical, central, longitudinal section, and

Figure 4&5 a transverse section on the line of Figure 3.

inder 3 which is closed at opposite ends and provided in a side near one end with a longitudinal slot 15 in which operates a pointer 13 carried by a plate or disk 11 loose within ;the cylinder and ad'ustable by means of a f- ;set screw 12 threade .into a head of the cylmder and having a swivel connection at its' "i m and with the part 11. A scale it provided at one side of the slot 15 to designate the am pressure. The ointer 13 00- operates with the scale 14 an may be set to indicate any desired pressure by means of the set screw 12. A piston 4 has a close fit within the cylinder 3 and anOe-xpansible spring 10 is disposed between the piston 4 and the part 11 and its efiective tension is regulated by means of the set screw v12. A cut od 5 is located in one end of the cylinder 3 and is connected to'the piston 4 by means of a stem 6 whereby the cut ofi and piston move in unlson. The peripheral portion of the cut ofl 5 has a close fit against the inner wall of T the cylinder 3 and said cut ofi has openings 5 for-the unobstructed passage therethrough ofthe air pressure. An outlet 8 isprovided 1n a side of the cylinder 3 for the discharge of the air p-ressure,said outlet being adapted to be connected with the air valve of a pneu- .matic tire or other device in any preferred way An inlet 2 for the air pressure from a sultable source of supply is provided in a slde of the cylinder 3 andis controlled by means of a valve 1 which in the preferable construction is -of the rotary type. The valve 1 controls the supply of air to the cylinder 3.

' (aylinder 9 is provided at one side of the cyhn er 3 and is in communicationthere with by means of an opening 7. A piston 15 in the c linder 9 is connected in any manner with the valve 1 whereby when the predetermined pressure has been reached said valve 1 is closed thereby automatically cutting ofi further supply of pressure to the cylinder 3: A moment before this action takes place the piston 4 is moved against the tension of the spring 10 and operates the cut oil? 5 connectedtherewith to close the outlet 8 and an instant later uncover the opening 7 whereby the presure from the cylinder 3 passes through the cut ofi 5 and into the cylinder 9 through the opening 7 and operates the piston 15 whereby to close the valve 1. A spring 16 in cooperative relation with the piston 15 is tensioned when the piston 15 moves to close the valve 1. When the pressure exerted on the piston 15 to efiect the closing of the valve 1 decreases the spring 16 reacts and automatically moves the piston 15 and opens the valve 1 to admit a further suppl 0 pressure to the cylinder 3 if desired. I Th predetermined pressure may be regulated by operating the setscrew tween the stem of the 12 and is determined by means of the scale 14 and the pointer 13 cooperating therewith. A link 17 forms the connecting means beiston 15 and the rotary'element of the va ve 1.

Having thus described the invention, What I claim is 1. A pressure regulator and cut oil comprising a cylinder having an inlet and an outlet, a piston within the cylinder at one side of the said inlet and outlet, pressure setting means in cooperative relation with the piston, a cut off connected with the piston and movable therewith to close the saidoutlet and normally acting to hold the piston in a. given position, a valve for-controlling the air pressure to the cylinder and valve operating means having communication with said cylinder to be actuated by the predetermined air pressure to close the said valve andcut ofi' the supply thereto, the communication between the cylinder and said valve controlling means being normally closed by the said cut oil connected with the piston.

opening, a valve controlling the supply of pressure to the cylinder, a supplemental cylinder in communication with the said lateral opening, and a piston in the supplemental cylinder and having connection with the said valve whereby to operate the latter and cut off the supply When'the predetermined pressure has been reached within the main cylinder.

In testimony whereof I aflix my signature in presence 0t two witnesses.

JOHN B. MORROW.

Witnesses: 1

CLAUDE R. OLEWINE, V HOWARD H SCHRIVER. 4 

